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Reinsurance (Cumulative Incurred Claims) (Details) - USD ($) | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | --- | --- | --- | ---
Cumulative Incurred Claims [Line Items] |  |  |  |  |
Cumulative Incurred Claims | $ 267,100,000 |  |  |  |
Claims Reserve | $ 6,000,000.0 |  |  |  |
Cumulative Number Of Reported Claims | 165,084 |  |  |  |
Incident Year - Four Years Prior [Member] |  |  |  |  |
Cumulative Incurred Claims [Line Items] |  |  |  |  |
Cumulative Incurred Claims | $ 37,700,000 | $ 37,700,000 | $ 37,700,000 | $ 37,600,000 | $ 37,700,000
Claims Reserve | $ 0 |  |  |  |
Cumulative Number Of Reported Claims | 28,214 |  |  |  |
Incident Year - Three Years Prior [Member] |  |  |  |  |
Cumulative Incurred Claims [Line Items] |  |  |  |  |
Cumulative Incurred Claims | $ 39,300,000 | 39,300,000 | 39,200,000 | $ 38,900,000 |
Claims Reserve | $ 0 |  |  |  |
Cumulative Number Of Reported Claims | 28,855 |  |  |  |
Incident Year - Two Years Prior [Member] |  |  |  |  |
Cumulative Incurred Claims [Line Items] |  |  |  |  |
Cumulative Incurred Claims | $ 47,800,000 | 47,700,000 | $ 46,000,000.0 |  |
Claims Reserve | $ 0 |  |  |  |
Cumulative Number Of Reported Claims | 30,492 |  |  |  |
Incident Year - Prior Year [Member] |  |  |  |  |
Cumulative Incurred Claims [Line Items] |  |  |  |  |
Cumulative Incurred Claims | $ 69,200,000 | $ 68,900,000 |  |  |
Claims Reserve | $ 0 |  |  |  |
Cumulative Number Of Reported Claims | 38,725 |  |  |  |
Incident Year - Current Year [Member] |  |  |  |  |
Cumulative Incurred Claims [Line Items] |  |  |  |  |
Cumulative Incurred Claims | $ 73,100,000 |  |  |  |
Claims Reserve | $ 6,000,000.0 |  |  |  |
Cumulative Number Of Reported Claims | 38,798 |  |  |  |

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- Definition Estimated costs as of the balance sheet date of settling insured claims and costs incurred in the claims settlement process for claims that have not yet been submitted to the insurance company for reimbursement. + References No definition available. + Details
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